If you have successfully restored your device, consider uploading your firmware to a public repository to help the next person facing the same boot loop. In the world of obscure Spreadtrum chips, community sharing is the only safety net.
Go to Settings > About Tablet and look for the build number (e.g., SP7731E_1H10_T702_20211208 ). The presence of "1H10" in the build string is a strong indicator. sp7731e 1h10 native firmware
SP7731E 1H10 native firmware refers to the original stock software designed for devices using the Spreadtrum (Unisoc) SC7731E chipset. This specific build is most commonly found in generic Android car stereos (head units) and budget smartphones. DeviceAtlas Understanding the Firmware Chipset Core: If you have successfully restored your device, consider
If you can access ADB or fastboot: